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n in (-oo:+oo)
2-((3/8)*n) = 13 // - 13
2-((3/8)*n)-13 = 0
(-3/8)*n-13+2 = 0
-3/8*n-11 = 0 // + 11
-3/8*n = 11 // : -3/8
n = 11/(-3/8)
n = -88/3
n = -88/3
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